<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="js/vue.js"></script>
</head>

<body>
    <div id="root">
        <h2>列表渲染</h2>
        <input type="text" placeholder="请输入名字" v-model="keyWord">
        <button @click="sortType=2">年龄升序</button>
        <button @click="sortType=1">年龄降序</button>
        <button @click="sortType=0">原顺序</button>
        <ul>
            <li v-for="(p, index) of filPersons" :key="index">{{p.name}}--{{p.age}}--{{p.sex}}</li>
        </ul>
    </div>
    <script>
        Vue.config.productionTip = false;

        new Vue({
            el: '#root',
            data: {
                keyWord: '',
                sortType: 0, //0原序 1降序 2升序
                persons: [{
                    id: '001',
                    name: '张三',
                    age: 18,
                    sex: '男'
                }, {
                    id: '002',
                    name: '李四',
                    age: 68,
                    sex: '男'
                }, {
                    id: '003',
                    name: '王小五',
                    age: 28,
                    sex: '女'
                }, {
                    id: '004',
                    name: '王小木',
                    age: 55,
                    sex: '男'
                }]
            },
            computed: {
                filPersons() {
                    const arr = this.persons.filter((p) => {
                            return p.name.indexOf(this.keyWord) !== -1
                        })
                        //判断一下是否需要排序
                    if (this.sortType) {
                        arr.sort((p1, p2) => {
                            return this.sortType === 1 ? p2.age - p1.age : p1.age - p2.age;
                        })
                    }
                    return arr
                }
            }
        })
    </script>
</body>

</html>